diff --git a/src/TMS_TreeWriter.cpp b/src/TMS_TreeWriter.cpp
index d312eabb..1c2f1dab 100644
--- a/src/TMS_TreeWriter.cpp
+++ b/src/TMS_TreeWriter.cpp
@@ -1261,6 +1261,7 @@ void TMS_TreeWriter::Fill(TMS_Event &event) {
         RecoTrackHitPos[itTrack][j][1] = RecoTrack->Hits[j].GetNotZ();
       }
       RecoTrackHitPos[itTrack][j][2] = RecoTrack->Hits[j].GetZ();
+      RecoTrackHitPos[itTrack][j][3] = RecoTrack->Hits[j].GetT();
     }
     // Can manually compute direction if it hasn't been set
 //    if ( (RecoTrackDirection[itTrack][0] == 0) && (RecoTrackDirection[itTrack][1] == 0) && (RecoTrackDirection[itTrack][2] == 0) )
@@ -1688,6 +1689,7 @@ void TMS_TreeWriter::Clear() {
       RecoTrackHitPos[i][k][0] = DEFAULT_CLEARING_FLOAT;
       RecoTrackHitPos[i][k][1] = DEFAULT_CLEARING_FLOAT;
       RecoTrackHitPos[i][k][2] = DEFAULT_CLEARING_FLOAT;
+      RecoTrackHitPos[i][k][3] = DEFAULT_CLEARING_FLOAT;
     }
     RecoTrackEnergyRange[i] = DEFAULT_CLEARING_FLOAT;
     RecoTrackEnergyDeposit[i] = DEFAULT_CLEARING_FLOAT;
diff --git a/src/TMS_TreeWriter.h b/src/TMS_TreeWriter.h
index 758923e3..93dfc81c 100644
--- a/src/TMS_TreeWriter.h
+++ b/src/TMS_TreeWriter.h
@@ -46,9 +46,9 @@ class TMS_TreeWriter {
     int nTracks;
     int nHitsIn3DTrack[__TMS_MAX_TRACKS__];
     int nKalmanNodes[__TMS_MAX_TRACKS__];
-    float RecoTrackKalmanPos[__TMS_MAX_TRACKS__][__TMS_MAX_LINE_HITS__][3];
-    float RecoTrackKalmanTruePos[__TMS_MAX_TRACKS__][__TMS_MAX_LINE_HITS__][3];
-    float RecoTrackHitPos[__TMS_MAX_TRACKS__][__TMS_MAX_LINE_HITS__][3]; // Due to a lack of variables, but as this is taken from line hits, it would make sense (maybe times 2?)
+    float RecoTrackKalmanPos[__TMS_MAX_TRACKS__][__TMS_MAX_LINE_HITS__][4]; // x,y,z,t
+    float RecoTrackKalmanTruePos[__TMS_MAX_TRACKS__][__TMS_MAX_LINE_HITS__][4];
+    float RecoTrackHitPos[__TMS_MAX_TRACKS__][__TMS_MAX_LINE_HITS__][4]; // Due to a lack of variables, but as this is taken from line hits, it would make sense (maybe times 2?)
     float RecoTrackHitEnergies[__TMS_MAX_TRACKS__][__TMS_MAX_LINE_HITS__]; // Due to a lack of variables, but as this is taken from line hits, it would make sense (maybe times 2?)
     float RecoTrackStartPos[__TMS_MAX_TRACKS__][3];
     float RecoTrackStartDirection[__TMS_MAX_TRACKS__][3];